Quick deploying RV pushup mast

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Citywide 173
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Quick deploying RV pushup mast

#1 Post by Citywide 173 » 24 Sep 2015 00:11

About a year ago I came across a 1992 Winnebago Adventurer at a very good price. Over the past year, I have been replacing the rug in the galley and bathroom with tile, upgrading the power converter, replacing the TVs, replacing the battery disconnect relay and other modernizations and repairs. Yesterday, I decided to address the monitoring needs. I already have mirror mounts for the quad band and the CB, but wanted something with a little more "umph" for stationary monitoring. Here is what I came up with:

The top section is 1-1/2" PVC, one T section, 2 90 degree elbows and three 2 foot pipe sections. I ended up removing the end caps, as they interfered with the antenna mounts.
The attachment IMG_20150923_151909_903.jpg is no longer available
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#2 Post by Citywide 173 » 24 Sep 2015 00:13

One the three pipes was cut in half and the sections were arranged into a goalpost configuration.
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#3 Post by Citywide 173 » 24 Sep 2015 00:14

The assembled top mast on top of a 10 foot section of 1-1/2" PVC
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#4 Post by Citywide 173 » 24 Sep 2015 00:17

I drilled a 7/16" hole through the top T and the top of the 10 foot PVC section. It is designed to accommodate a 3/8" eye bolt for coax routing and easy assembly/disassembly.
top joint-hole.jpg
top joint-hole.jpg
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#5 Post by Citywide 173 » 24 Sep 2015 00:20

Next, the 1-1/2" PVC pipe was mated with a 2" PVC pipe. The sections fit together nicely and don't allow a lot of movement between them.
push up-1.jpg
Another 7/16" hole was drilled through both pipes. There is about six inches of pipe overlap on each side of the bolt.
push up-1.jpg
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push up-2.jpg
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#6 Post by Citywide 173 » 24 Sep 2015 00:26

The lower eye bolt in place.
push up-6.jpg
I then slid the 1-1/2" pipe down into a "nested" position that would allow for placement of the top section and again, drilled a hole through the 1-1/2" section that corresponded with the existing holes of the 2" section.
push up-6.jpg
I placed a ring of electrical tape on the 1-1/2 section to indicate when the holes are in alignment. I did this for both the nested and extended positions.
push up-6.jpg
push up-6.jpg
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push up-3.jpg
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#7 Post by Citywide 173 » 24 Sep 2015 00:26

The mast was then secured to the ladder of the RV with hose clamps.
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#8 Post by Citywide 173 » 24 Sep 2015 00:31

A Tram 1465 (NMO) and a Tram 1460 (UHF) mount was attached to each side of the top section. This is where I realized the end caps had to come off.
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#9 Post by Citywide 173 » 24 Sep 2015 00:33

Austin Spectra and Diamond CR8900 on the mounts.
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antennas on mast.jpg
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#10 Post by Citywide 173 » 24 Sep 2015 00:34

The top section attached to the push up section.
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#11 Post by Citywide 173 » 24 Sep 2015 00:38

Done!
Done 1.jpg
Done 1.jpg
After finishing, I think I might get a section of 2-1/2" PVC and cut all lengths to 8 feet in a similar fashion which would allow the push up section to be permanently attached to the ladder. The current configuration is a bit too tall to leave there, but it meets my needs for now. Total assembly time for the project was about 60 minutes and cost was right around $50 for the mast materials-I already had the mounts and antennas.
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done 2.jpg
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#12 Post by N1BHH (Silent Key) » 24 Sep 2015 00:56

That beats spending $170 for Rohn H50 34-foot Aluminum telescoping mast.
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